[AR] Re: SpaceX F9 Launch/Update -- Live Link
- From: "John Dom" <johndom@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Fri, 25 Dec 2015 22:12:15 +0100
Quite a mess.
jd
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Chris Jones
Sent: vrijdag 25 december 2015 0:28
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: SpaceX F9 Launch/Update -- Live Link
On 12/24/15 5:35 PM, Henry Vanderbilt wrote:
All due respect, but SRB's are simply not a useful reuse economics
model for soft-landing recovered liquid booster stages. As I recall,
between the effects of double-digit-G's water impact and salt
immersion, the only part of the SRB's NASA was actually willing to
reuse were the stripped steel casings, after they were scoured out
then checked for cracks.
One of the effects of the ocean impact was the fact that the boosters got
somewhat deformed. There was a whole rig built to squeeze casing segments back
into circular. (Interestingly, the rebuilt SRBs were usually composed of
casing segments from different previously flown SRBs). I seem to remember that
one of the two casings making up the joint on 51L that suffered the
burn-through had been the most deformed (or the one that required the most
force to get back in shape?), though it wasn't cited as the primary cause of
the Challenger loss.
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